Hi your plugin is great but I am also looking into having the option of searching custom fields.

I have 3 fields which I would like to add to the pop up screen ( or have a dropdown with all custom fields and then free text) can you kindly advise on how best to proceed. Aside from that I would also need to search by author.

This plugin isn't heavily documented, I haven't had time to put resources on it because it's actually just been isolated from the Pods project which has it's own filter handling automatically without needing for extending.

With that said, I'll add this to my to-dos to get to you, I can't gaurantee a timeline, you may be better off looking at the code and finding the WP hook to filter the fields / filters available.